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Thread: Closing SWG AGP

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    Closing SWG AGP

    So I left my SWG on for weeks on end... and my FC rose and rose. Been too cold to swim for over a month, so very ready to close this pool. The leaves fall in faster than I can reasonably keep up with by running pump and pool vac.

    My readings are below:

    pH = 7.8
    FC = 15
    CC = 0
    TA = 70
    CH = 80
    CYA = 40

    I got a little confused with shocking and closing - some posts mentioned dropping the FC to 1/2 of shock (I'm pretty much at shock now, unless I raise my CYA). Another thing I don't get is the reference page/chart for SWG starts at CYA much higher. Do I need to add CYA prior to closing (thereby adding chlorine to get back up to shock)?

    I'm using a vinyl solid cover - Nothing fancy.

    Last year I had a few issues: my Gizzmo wasn't threading right, so I had water leaking out of the skimmer. botched the closing royally last year (didn't measure levels of anything. Drained a LOT of water, to realize it was too low, so just added more water from hose). So needless to say opening, I was at green. Would love to avoid that this year.
    15K AG, w. Chlorease SWG; 150 sqft cartridge (ClearwaterII); Two Speed pump, seems to only work on one speed; less than 10 yrs old; partially decked.

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    Re: Closing SWG AGP

    Pulling to cover over today. do most people here use Polyquat - or only as a last resort after many failed closings?
    15K AG, w. Chlorease SWG; 150 sqft cartridge (ClearwaterII); Two Speed pump, seems to only work on one speed; less than 10 yrs old; partially decked.

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    linen's Avatar
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    Re: Closing SWG AGP

    I don't use polyquat, but my pool freezes solid.

    FYI, we don't recommend closing before the pool temp is consistently lower than 60F, and open before the temp goes above 60F.

    Here is the pool school article on closing an agp: http://www.troublefreepool.com/pool-...20group%20pool
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: Closing SWG AGP

    Quote Originally Posted by linen
    I don't use polyquat, but my pool freezes solid.

    FYI, we don't recommend closing before the pool temp is consistently lower than 60F, and open before the temp goes above 60F.

    Here is the pool school article on closing an agp: http://www.troublefreepool.com/pool-...20group%20pool
    Thanks linen! - i actually 'attended' pool school... the temp thing I can appreciate but dang it the leaves were choking up the skimmer basket. If I run it at night, by the time I wake up the pump is whining (I can almost hear a pitch difference). If I run it during the day, it's whining by the time I get home (gone for 12 hrs most days). I have a timer that's busted, but I just don't trust my setup enough to run it via timer. IF/when there's a problem (like a leak on a line or blown o-ring, etc) it always shows up when the pump fires up.

    I saw somewhere on here the leaf catcher thing, will shoot for that next time. Water temp was at about 68 degrees when I closed.

    I also couldn't drop my water to 6" below lowest return... that would make the cover incompatible (cover warns not to drop more than 12" below rail/deck). I dropped below skimmer, and plugged the return. plugged skimmer with a not so great gizzmo.

    How can you tell that the entire pool is frozen solid?
    15K AG, w. Chlorease SWG; 150 sqft cartridge (ClearwaterII); Two Speed pump, seems to only work on one speed; less than 10 yrs old; partially decked.

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    linen's Avatar
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    Re: Closing SWG AGP

    Yeah, leaves can be a challenge...If I leave my solar cover on, then almost all the leaves just sit on that and cause no problem with circulation. Then if I roll that up slowly, I catch most of the leaves and can spray them off outside of the pool. My pool gets a lot of leaves (and shade unfortunately).

    Quote Originally Posted by armedmetallica
    I also couldn't drop my water to 6" below lowest return... that would make the cover incompatible (cover warns not to drop more than 12" below rail/deck). I dropped below skimmer, and plugged the return. plugged skimmer with a not so great gizzmo.
    To deal with this, when I buy a cover, I get it quite oversized, usually 6 ft larger in diameter than the pool.

    Quote Originally Posted by armedmetallica
    How can you tell that the entire pool is frozen solid?
    Well I am slightly north of the Twin Cities in Minnesota and the average low temp in the dead of winter is ~2F and we don't get above freezing with our average high for ~3.5 months.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: Closing SWG AGP

    i'm replying to this - because most of the info is the same as last year and the opening was pretty flawless.

    BUT this year my readings are slightly different. Should I drop FC? ? I know i need to fix pH, and i'm thinking increase the CYA?

    ph = 8.0
    FC = 29.5
    cc= 0
    TA = 90
    CYA = 40

    I'm planning on closing today, in a couple of hours... do I need to add stabalizer and let it circulate for a couple of hours? Or do I need to wait 24hrs? Same for Muriatic - should I add and wait 24hrs? or Can I just let it go for a couple of hourS?
    15K AG, w. Chlorease SWG; 150 sqft cartridge (ClearwaterII); Two Speed pump, seems to only work on one speed; less than 10 yrs old; partially decked.

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    n240sxguy's Avatar
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    Closing SWG AGP

    I wouldn't add cya until next year. FC level above 10 will cause a false ph reading. I have trouble with a lot of leaves too. I'm just going out every day or two, checking FC, and getting all the leaves out then. Rinse and repeat until below 60.
    30K gallon IG vinyl. 1.5HP 2-speed Waterway Mustang pump. 600 lb sand filter. Polaris 280. Circupool SI-60+. TF-100

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    Re: Closing SWG AGP

    my annual closing thread - i might as well keep updating this to remind myself

    pH is at 7.5
    CYA < 20
    FC = 10
    TA = 80
    CC = 0.5

    This year, i think i'm going to have to raise the CYA, right??
    15K AG, w. Chlorease SWG; 150 sqft cartridge (ClearwaterII); Two Speed pump, seems to only work on one speed; less than 10 yrs old; partially decked.

  9. Back To Top    #9
    Mod Squad pooldv's Avatar
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    Re: Closing SWG AGP

    I would add it in the spring when you open.
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    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    Re: Closing SWG AGP

    Quote Originally Posted by pooldv View Post
    I would add it in the spring when you open.
    wow really - even with it being that low? So that would mean i'm technically at shock then right? Or should I increase the FC a bit? or leave it at 10?
    15K AG, w. Chlorease SWG; 150 sqft cartridge (ClearwaterII); Two Speed pump, seems to only work on one speed; less than 10 yrs old; partially decked.

  11. Back To Top    #11
    Mod Squad pooldv's Avatar
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    Re: Closing SWG AGP

    10 is ok. Yes, at shock level now. CYA protects chlorine from the sun and buffers it for comfort during swimming. Neither is needed while the pool is closed. You will lose some CYA over winter also.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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